Improvement of thermoelectric properties of lanthanum cobaltate by Sr and Mn co-substitution

JOURNAL OF ALLOYS AND COMPOUNDS

卷:735

Article

Kumar, Ashutosh¹  Sivaprahsam, D.²  Thakur, Ajay D.¹ 

[1] Indian Inst Technol Patna, Dept Phys, Bihta 801106, India

[2] Indian Inst Technol Madras, ARC Int, Res Pk, Madras 600133, Tamil Nadu, India

关键词: Powders: solid-state reaction;    Thermal conductivity;    Electrical conductivity;    Perovskites;   

DOI  :  10.1016/j.jallcom.2017.11.334

来源: Elsevier

【 摘 要 】

We report thermoelectric (TE) properties of Sr and Mn co-substituted LaCoO3 system from room temperature to 700 K. Sr-substitutions at La and Mn at Co site in LaCoO3 improves the electrical conductivity (sigma). Thermal conductivity (kappa) of all the samples increases with the increase in temperature but decreases with the substitution in LaCoO3. An estimation of the electronic thermal conductivity (kappa(e)) suggests a dominant phonon contribution to thermal conductivity in this system. A maximum value of the figure of merit is 0.14 at 480 K for La0.95Sr0.05Co0.95Mn0.05O3. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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